Problem: The reaction of Fe2O3(s) with Al(s) to form Al2O3(s) and Fe(s) is called the thermite reaction and is highly exothermic.What role does lattice energy play in the exothermicity of the reaction?

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We are asked what role does lattice energy play in the exothermicity of the given reaction:

Fe2O3(s) + Al(s) → Al2O3(s) + Fe(s)

Recall that:

  • The lattice energy of a crystalline solid is a measure of the energy released when ions are combined to make a compound.
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Problem Details

The reaction of Fe2O3(s) with Al(s) to form Al2O3(s) and Fe(s) is called the thermite reaction and is highly exothermic.

What role does lattice energy play in the exothermicity of the reaction?